P93suafilo
Member
- Joined
- Mar 23, 2015
- Messages
- 137
- Reaction score
- 14
- Points
- 18
- Location
- Lehi UT
- Vehicle Year
- 1997, 89, 94
- Make / Model
- Ford
- Engine Type
- 4.0 V6
- Engine Size
- 4.0
- Transmission
- Manual
- 2WD / 4WD
- 4WD
When I first bought my truck in the early summer I was getting about 16.3 mpg then I changed out some bad O2 sensors and my mileage jumped to 16.7 mpg. I thought great the more standard maintenance I do the higher I will get, being I don't have a lead foot. Last month I decided to do some more and did the spark plugs, air filter, and oil. I expected my fuel mileage to jump after doing that but now its taking all I got to keep 16 mpg and on the highway its even worse. I did everything to spec and I am wondering why would my fuel mileage drop?